A locking device with two keys spaced approximately 180 degrees center to center and protruding from the seating surface of the ring. When installed the keys mate with companion keyways in the external threads of screw thread inserts, locked-in studs, or similar type items, and cut through sufficient threads of the parent material tapped hole to provide a positive lock between the threaded bodies.
NSN 6240-00-997-4559
NSN 5990-00-056-2027
NSN 6105-00-432-2654
NSN 5990-01-503-9804
NSN 6620-01-444-4048
NSN 6650-01-463-2274
NSN 5965-01-349-9029
NSN 5975-00-231-9499
NSN 5910-01-551-1473
NSN 4140-01-101-9060
NSN 6110-01-531-6524
NSN 5915-01-153-0121